brakeshoes to exert greater force.
Every car is inspected for
excessive air leakage, and the gages are checked to determine the
entire trainline leakage.
If leakage is within permissible limits,
usually 5 pounds per minute, the train is reported to the yardmaster
as ready for movement.
Should defective (bad-order) cars be found
that cannot be repaired immediately, the car inspectors write up a
"shop" or bad-order tag, and then the yardmaster has such cars cut
out of the train.
The efforts of the various crews, whose duties are outlined in
this chapter, must be coordinated to the extent that the work of
readying trains for movement proceeds smoothly and quickly.
train is received into a yard, numerous workers go into action. They
perform inside and outside clerical work, inspect for defects, switch
according to classification or grouping, double-up according to the
crews, yard crews, inbound and outbound yard clerks, car inspectors,
air inspectors, and others, all do essential and special jobs.
yardmaster supervises the entire operation, with but one objective--
keeping trains coming into one end of the yard and rolling out of the